60 lines
1.6 KiB
C
60 lines
1.6 KiB
C
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// Copyright (C) 2007 Id Software, Inc.
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//
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#ifndef __TRACESURFACE_H__
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#define __TRACESURFACE_H__
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/*
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===============================================================================
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Traceable surface.
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===============================================================================
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*/
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const int DEFAULT_HASH_AXIS_BINS = 128; // must be a power of two
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const int MAX_LINKS_PER_BLOCK = 0x100000;
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const int MAX_LINK_BLOCKS = 0x100;
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class sdTraceSurface {
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public:
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explicit sdTraceSurface( const idDrawVert* verts, const int numVerts, const vertIndex_t* indexes, const int numIndexes, const int hashBinsPerAxis = DEFAULT_HASH_AXIS_BINS );
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~sdTraceSurface();
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bool RayIntersection( const idVec3& start, const idVec3& end, idDrawVert& dv ) const;
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private:
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struct triLink_t {
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int faceNum;
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int nextLink;
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};
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void CreateHash();
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void GetNextHashBin( const idVec3& point, const idVec3& normal, int hashBin[3], int& separatorAxis, float& separatorDist ) const;
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float TraceToMeshFace( const int faceNum, const idVec3& point, const idVec3 &normal, const float faceDist, const float traceDist, idDrawVert& dv ) const;
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sdTraceSurface& operator=( const sdTraceSurface& rhs );
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public:
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const idDrawVert* verts;
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const int numVerts;
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const vertIndex_t* indexes;
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const int numIndexes;
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idBounds _bounds;
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idPlane* facePlanes;
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// the hash
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float binSize[ 3 ];
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float invBinSize[ 3 ];
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int binsPerAxis;
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int numLinkBlocks;
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triLink_t* linkBlocks[ MAX_LINK_BLOCKS ];
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int*** binLinks;
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};
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#endif /* !__TRACESURFACE_H__ */
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